Dave:
The 357 version of the 135 gr GDSB has been so hard to find, I've had some on backorder from Midway for like 9 months. I have several boxes in hand, but recently ordered some of the .38 +P version of the same cartridge. It comes in 50 Rd boxes for less than they charge for the 20 Rd boxes of the .357 version. Sometimes SGAmmo has it in stock, and I have found it at some of the other internet vendors as well. It doesn't have quite the velocity as the 357, but uses the same bullet, at almost as high a speed.
Best Regards, Les